Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
  • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
  • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B19/00—Slide fasteners
  • A44B19/24—Details
  • A44B19/26—Sliders
  • A44B19/267—Sliders for slide fasteners with edges of stringers having uniform section throughout the length thereof
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T24/00—Buckles, buttons, clasps, etc.
  • Y10T24/25—Zipper or required component thereof
  • Y10T24/2561—Slider having specific configuration, construction, adaptation, or material
  • Y10T24/2564—Slider having specific configuration, construction, adaptation, or material including converging channel and relatively movable separator island
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T24/00—Buckles, buttons, clasps, etc.
  • Y10T24/25—Zipper or required component thereof
  • Y10T24/2561—Slider having specific configuration, construction, adaptation, or material
  • Y10T24/2582—Slider having specific configuration, construction, adaptation, or material having specific contour or arrangement of converging channel, separator island, or wing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T24/00—Buckles, buttons, clasps, etc.
  • Y10T24/25—Zipper or required component thereof
  • Y10T24/2561—Slider having specific configuration, construction, adaptation, or material
  • Y10T24/2588—Slider having specific configuration, construction, adaptation, or material including means for attaching components of slider together

Definitions

• This invention relates generally to reclosable plastic bags with closing zippers, and more particularly to zipper slider features thereof.
• a flexible bag has a zipper-type closure with flexible strips attached to the bag walls, the strips having interlocking rib and groove profiles, and a slider.
• the slider is movable in one direction longitudinally of the strips to progressively separate the rib from the groove to open the bag, and is movable in the opposite direction to progressively return the rib to retained condition in the groove to close the bag.
• the slider has a separator normally situated in a rest position in the tops of the strips, when the slider is in a bag-closed stop location. As the slider is moved in the bag-opening direction, the separator pivots downward to disengage the interlocking profile features and open the bag.
• the separator When the slider is moved in the bag-closing direction, the separator is cammed upward by the strip tops until it rides atop the strips, and the tapering walls of the slider squeeze the interlocking profile features together, closing the bag.
• a guide pin on the slider guides the slider to a desired point, without opening the bag.
• Fig. 1 is a front elevational view of a reclosable plastic bag with a zipper assembly according to one embodiment of the present invention.
• Fig. 2 is a top plan view thereof.
• Fig. 3 is an enlarged section through the slider and track portion taken at line 3-3 in Fig. 2 and viewed in the direction of arrows and showing the slider in a bag-closed stop position.
• Fig. 4 is a much-enlarged cross sectional view taken at line 4-4 in Fig. 2 and viewed in the direction of the arrows .
• Fig. 5 is a top plan view of the bag assembly with the slider in position with the bag partially open.
• Fig. 6 is a sectional view through the slider and track assembly taken at line 6-6 in Fig. 5 and viewed in the direction of the arrows.
• Fig. 7 is a much-enlarged cross sectional view thereof taken at line 7-7 in Fig. 5 and viewed in the direction of the arrows.
• Fig. 8 is a top plan view of the bag assembly with the slider in a bag partially-open position but with the slider moving to the right toward the bag-closed stop position.
• Fig. 9 is a sectional view therethrough taken at lines 9-9 in Fig. 8 and viewed in the direction of the arrows.
• Fig. 10 is a much-enlarged cross sectional view taken at line 10-10 in Fig. 8 and viewed in the direction of the arrows .
• Fig. 11 is a sectional view taken at line 11-11 in Fig. 9 and viewed in the direction of the arrows to show the tapering walls of the slider.
• Fig. 12 is a front elevational view of a reclosable plastic bag with a zipper assembly according to another embodiment of the present invention.
• Fig. 13 is a top plan view of the Fig. 12 embodiment.
• Fig. 14 is an enlarged sectional view taken at lines 14-14 in Fig. 13 and viewed in the direction of the arrows.
• Fig. 15 is a further enlarged sectional view through the slider itself taken at the same cutting plane as Fig. 14 except with the slider separate from the bag as before installation on the bag.
• Fig. 16 is a top plan view of the bag assembly of Figs. 12 and 13 but with the slider in position with the bag partially open.
• Fig. 17 is an enlarged sectional view through the slider and track assembly taken a line 17-17 in Fig. 16 and viewed in the direction of the arro s. DESCRIPTION OF THE PREFERRED EMBODIMENT
• a plastic bag 11 of conventional construction may be a sheet of polyethylene folded along the line 12 providing front and rear walls 13 and 14 (Fig. 4) sealed at the right-hand edge 16 and left-hand edge 17 by heat, ultrasonic or other type of sealing means.
• the marginal portions near the upper edges 13U and 14U are sealed by heat, ultrasonic welding or otherwise to base flanges 18B and 19B of elongated flexible plastic strips 18 and 19 at the front and rear bag walls. These strips are crimped and sealed at the right-hand end 18R and left-hand end 18L to the top of the bag and to each other.
• strips which are typically made of extruded plastic have complementary profiles in which a portion of the rear strip 19 forms a groove 19G therein which interlockingly receives the rib 18P with flanged head 18H of an arrow-shaped cross section profile portion in strip 18. Since the groove is C-shaped, after the faces 18F and 19F are forced toward each other, forcing the head into the groove, the strips will remain together, with the groove resiliently holding the rib head snugly in the groove, sealing the bag closed. In this condition, the strip upper flange edges 18T and 19T (Fig. 10) touch each other and supplement the coupling of the rib head with the groove in providing a secondary closure of the top of the bag assembly.
• Slider 21 is mounted on the strips 18 and 19. It includes a tunnel 22 of generally rectangular cross-sectional configuration extending lengthwise through it from an entrance end 23 to an exit end 24, the entrance and exit terminology referring to the relative direction of the track strip profile entering the entrance end 23 as the
• the top of the slider has an opening
• a downwardly projecting guide post 41 in the slider extends down between the edges 18T and 19T, It serves two purposes. First of all, it vei.y slightly spreads the edges 35 of the slot near the entrance end 38E of the notch 38. It also serves as a stop to limit the movement of the slider in the bag opening direction of arrow 42, at the left-hand end where the bag is crimped at 18L so the slider will not slide off the end. Similarly it can serve as a stop at the right-hand end.
• the material for the track strips is typically an extruded low density polyethylene.
• the material for the slider is typically a molded HMW plastic.
• the tab 34 have a predisposition to descend into the notches 37 and 38 when the slider is moved into the bag-closed stop position shown in Figs. 1-4. If the slider is molded in one step, with the tab 34 co-planar with the rest of the top of the slider, it may require a special molding technique to establish the predisposition for it to descend into the notch. It is also possible to mold the slider in two parts, with the tab being integral with the right-hand part and the opening 33 molded into the left-hand part, followed by ultrasonically or otherwise welding the two parts together.
• the tab could be molded or separately attached such as to project downward into the notch or even into the space between the complementary rib and groove 18P and 19G as shown in Figs. 6 and 7.
• the stop post 41 may be of metal or plastic driven into or through or molded or adhesively secured to the underside of the tunnel roof where shown in Fig. 3.
• Figs. 12 through 17 components which are identical to or very similar to those in Figs. 1 through 11 are given the same reference numerals but with a prefix "1".
• the bag 111 is like bag 11 except that the elongated flexible plastic strips 118 and 119 do not have the notch 38 in the top thereof. This is evident upon comparison of Fig. 5 with Fig. 16, and Fig. 6 with Fig. 17.
• slider 121 is different in the respect that, in this embodiment, it is molded with the wedging tab 134, 136, perpendicular to the top of the tunnel, as shown in the sectional view of Fig. 15.
• the post 141 may be made and mounted as described for post 41.
• the material of the slider being flexible and somewhat resilient, enables the tab 134, 136 to be resiliently pushed upward in the direction of arrow 147 to the position shown in Fig. 14 and dotted in Fig. 16, as the slider is moved in the bag-closing direction of arrow 126 (Fig. 16).
• the tab When the tab is in this position, the tip of it rests atop the upper edges 118T and 119T of the strips 18 and 19, as shown for the previously described embodiment in Fig. 10.
• the side edges of the point converge in the same, bag-opening direction as slider walls 131 and 132, toward the exit end 124 of the slider. It is preferable that, as in the previously described embodiment, the post 141 not resiliently bend but, instead remain in the position shown in Fig.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bag Frames (AREA)
• Slide Fasteners (AREA)

Applications Claiming Priority (3)

Publications (3)

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Country Status (7)

Families Citing this family (91)

Citations (3)

Family Cites Families (23)

• 1996
  • 1996-11-25 US US08/758,170 patent/US5871281A/en not_active Expired - Lifetime
• 1997
  • 1997-11-12 AU AU53575/98A patent/AU5357598A/en not_active Abandoned
  • 1997-11-12 DK DK97950621T patent/DK0975524T3/da active
  • 1997-11-12 EP EP97950621A patent/EP0975524B1/de not_active Expired - Lifetime
  • 1997-11-12 DE DE69727501T patent/DE69727501T2/de not_active Expired - Fee Related
  • 1997-11-12 ES ES97950621T patent/ES2216182T3/es not_active Expired - Lifetime
  • 1997-11-12 WO PCT/US1997/021001 patent/WO1998023493A1/en active IP Right Grant

Patent Citations (3)

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